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Vulnerabilities

Vulnerability · CVE-2021-47873

VestaCP versions prior to 0.9.8-25 contain a cross-site scripting vulnerability in the IP interface configuration that allows attackers to inject malicious scripts.

Published Jan 21, 2026 · catalog updated Mar 5, 2026 · VestaCP VestaCP

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2021-47873. EPSS is 0.23%. Act only if a listed version of VestaCP VestaCP is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium5.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.23%
Remediation
Vendor / distro source
Affected products
vendor VestaCP VestaCP 0.9.8 ≤0.9.8-25

VestaCP versions prior to 0.9.8-25 contain a cross-site scripting vulnerability in the IP interface configuration that allows attackers to inject malicious scripts. Attackers can exploit the 'v_interface' parameter by sending a crafted POST request to the add/ip/ endpoint with a stored XSS payload.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor VestaCP VestaCP 0.9.8 ≤0.9.8-250.9.8 ≤0.9.8-25

How to fix CVE-2021-47873

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2021-47873. EPSS is 0.23%. Act only if a listed version of VestaCP VestaCP is installed.

Which versions are affected?

Compare what you have installed with VestaCP VestaCP 0.9.8 ≤0.9.8-25 0.9.8 ≤0.9.8-25. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.23%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 21, 2026 · EUVD

    Detected

    VestaCP versions prior to 0.9.8-25 contain a cross-site scripting vulnerability in the IP interface configuration that allows attackers to inject malicious scripts. Attackers can exploit the 'v_interface' parameter by sending a crafted POST request to the add/ip/ endpoint with a stored XSS payload.

  2. Mar 5, 2026 · EUVD

    Updated

    VestaCP versions prior to 0.9.8-25 contain a cross-site scripting vulnerability in the IP interface configuration that allows attackers to inject malicious scripts. Attackers can exploit the 'v_interface' parameter by sending a crafted POST request to the add/ip/ endpoint with a stored XSS payload.

Sources

  • CVE.orgVulnerability recordCVE-2021-47873

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-47873

    30-day exploitation probability 0.23%

    first.org
  • EUVDVulnerability recordEUVD-2026-3630

    VestaCP versions prior to 0.9.8-25 contain a cross-site scripting vulnerability in the IP interface configuration that allows attackers to inject malicious scripts. Attackers can exploit the 'v_interface' parameter by sending a crafted POST request to the add/ip/ endpoint with a

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • FIRST EPSSNov 3, 2026
  • EUVDNov 2, 2026